1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * linux/arch/arm/boot/compressed/head-sa1100.
4 *
5 * Copyright (C) 1999 Nicolas Pitre <nico@fluxn
6 *
7 * SA1100 specific tweaks. This is merged int
8 *
9 */
10
11 #include <linux/linkage.h>
12 #include <asm/mach-types.h>
13
14 .section ".start", "ax"
15 .arch armv4
16
17 __SA1100_start:
18
19 @ Preserve r8/r7 i.e. kernel e
20 #ifdef CONFIG_SA1100_COLLIE
21 mov r7, #MACH_TYPE_COLLIE
22 #endif
23 mrc p15, 0, r0, c1, c0, 0
24 ands r0, r0, #0x0d
25 beq 99f
26
27 @ Data cache might be active.
28 @ Be sure to flush kernel bina
29 @ whatever state it is, before
30 @ This is done by fetching thr
31 @ memory to be sure we hit the
32 bic r2, pc, #0x1f
33 add r3, r2, #0x4000
34 1: ldr r0, [r2], #32
35 teq r2, r3
36 bne 1b
37 mcr p15, 0, r0, c7, c10, 4
38 mcr p15, 0, r0, c7, c7, 0
39
40 @ disabling MMU and caches
41 mrc p15, 0, r0, c1, c0, 0
42 bic r0, r0, #0x0d
43 bic r0, r0, #0x1000
44 mcr p15, 0, r0, c1, c0, 0
45 99:
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